22929440 has 48 divisors (see below), whose sum is σ = 54613440. Its totient is φ = 9096960.

The previous prime is 22929427. The next prime is 22929457. The reversal of 22929440 is 4492922.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 22929397 and 22929406.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21725 + ... + 22755.

It is an arithmetic number, because the mean of its divisors is an integer number (1137780).

Almost surely, 2^22929440 is an apocalyptic number.

22929440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22929440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27306720).

22929440 is an abundant number, since it is smaller than the sum of its proper divisors (31684000).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22929440 is a wasteful number, since it uses less digits than its factorization.

22929440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1185 (or 1177 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 22929440 is about 4788.4694840836. The cubic root of 22929440 is about 284.0955837757.

The spelling of 22929440 in words is "twenty-two million, nine hundred twenty-nine thousand, four hundred forty".